Sex has been used many times in advertising, using eroticism to attract customers. For example, Dolce&Gabbana used it in the ad bellow for what they have being accused of sexism and received a lot of critics.
It all depends on the subjectivity of the observer. There are many publicity photos, oriented to sexuality.
The brand Brian Atwood, launched this ad campaign for its new autumn-winter 2012-2013 collection and opening of its first store in New York.
Advertising with sex is very attractive and, for sure, help to sell better the product...